posted on Dec, 17 2008 @ 07:36 PM
I agree with the earlier posting about night photography. If you take photos without a flash, which these are, the exposure has to be set for longer
than 1/60th of a second, which is the standard exposure time the average automatic camera takes at "daytime room lighting" without the need of a
tripod. At night, cameras need to have longer exposure times to allow the enough light to generate an image. Without a tripod, night images such as
this wall and sidewalk are blurry because the photographer cannot stay steady enough throughout the required exposure time. This is where the
ghosting comes in. A walking person does not occupy the same space throughout the required shot time. Some of the light reflected in the exposure
comprises of the body part that was there, as well as the background. That's why their silhouette image is stronger in the centre than at the edges.
That's all it is; any photographer can confirm this. Remember Occam's Razor: the simplest explanation is often the most accurate one.